| 太湖东部湖湾水生植物生长区底泥氮磷污染特征 |
| |
| 引用本文： | 向速林,朱梦圆,朱广伟,许海.太湖东部湖湾水生植物生长区底泥氮磷污染特征[J].沉积学报,2014,32(6):1083-1088. |
| |
| 作者姓名： | 向速林 朱梦圆 朱广伟 许海 |
| |
| 作者单位： | 1.中国科学院南京地理与湖泊研究所 湖泊与环境国家重点实验室 南京 210008; |
| |
| 基金项目： | 国家自然科学基金项目(41171368,41230744);国家水体污染控制与治理科技重大专项(2012ZX07101-010)联合资助 |
| |
| 摘 要： | 为了解太湖东部湖湾(贡湖湾、光福湾、渔洋湾)表层底泥中氮、磷的污染特征及其与水生植物生长的关系,采集了各湖湾滨岸带水生植物生长区的表层底泥,探讨了水生植物的生长与分布对表层底泥中总氮(TN)、总磷(TP)及总有机碳(TOC)等含量的影响,并对表层底泥进行营养评价.结果表明,水生植物生长密集区底泥中TN、TP、TOC的含量均显著低于水生植物零星生长区,说明水生植物的生长对太湖东部湖湾表层底泥中营养盐与有机碳含量具有较为明显的影响;相关性分析显示,表层底泥中TOC与TN含量呈显著相关性(R2=0.832 8),而与TP的相关性则较弱(R2=0.166 5),反映了TOC在湖泊底泥中的沉积可能成为湖泊氮的重要来源,而对磷的影响较小.利用有机指数与有机氮指数两种方法分别对东部各湖湾底泥进行污染评价,贡湖湾、光福湾、渔洋湾底泥有机指数平均值分别为0.142 7、0.228 6与0.208 6,均属较清洁与尚清洁水平,而各湖湾有机氮指数平均值均为Ⅲ与Ⅳ级,说明底泥已遭受了一定程度的氮污染.因此,对水生植物零星生长区表层底泥中氮含量的控制与削减有利于湖泊富营养化的预防与治理.
|
| 关 键 词： | 太湖东部湖湾 水生植物 氮 磷 污染特征 |
| 收稿时间： | 2013-11-04 |
Pollution Characteristics of Nitrogen and Phosphorus in Sediment of the Eastern Bays of Lake Taihu with Aquatic Macrophytes |
| |
| Institution: | 1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008;2.Department of Environment Engineering, East China Jiaotong University, Nanchang 330013 |
| |
| Abstract: | To understand the pollution characteristics of nitrogen and phosphorus in surface sediment of the Eastern byas of Lake Taihu (Gonghu Bay, Guangfu Bay and Yuyang Bay) and its relationship with the growth of aquatic macrophytes, contents of total nitrogen (TN), total phosphorus (TP) and total organic carbon (TOC) of surface sediments were determined based on the investigation of surface sediment in eastern bays of Lake Taihu with aquatic macrophytes. The effects of aquatic macrophytes on pollution characteristics of TN, TP and TOC in surface sediments were analyzed, and pollution assessment for surface sediments was made. The results showed that the contents of TN, TP and TOC in growing area of aquatic macrophytes were significantly lower than that of the contrasted open water area, and the growth of aquatic plants has significant effect on TN, TP and TOC contents in surface sediments. Correlation analysis showed that TOC and TN were significantly correlated (R2=0.832 8), but with less significant correlation to TP (R2=0.166 5), reflecting TOC could become an important source of nitrogen in the deposition process of lake sediments, but less impact on the phosphorus. By evaluation pollution situation with organic index and organic nitrogen, the average organic index of Gonghu Bay, Guangfu Bay and Yuyang Bay were 0.142 7, 0.228 6, and 0.208 6, respectively. However, the average number of organic nitrogen was on the Ⅲ and Ⅳ level, which showed that nitrogen pollution of sediment is more serious. The investigation suggested that the control and reduction of nitrogen in surface sediment of the contrasted open water area are of important significance to the prevention and control of lake eutrophication. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《沉积学报》浏览原始摘要信息 |
| 点击此处可从《沉积学报》下载免费的PDF全文 |
|
